Errors compiling in release mode (phobos bug..?)

[simendsjo]

Compiling with --build=unittest and debug works, but not 
--build=release:

$ dub build --build=debug
Checking dependencies in 'C:\code\d\myapp'
Building configuration "application", build type debug
Copying files...
Running dmd (compile)...
Compiling diet template 'about.dt' (compat)...
Linking...


$ dub build --build=release
Checking dependencies in 'C:\code\d\myapp'
Building configuration "application", build type release
Copying files...
Running dmd (compile)...
Compiling diet template 'about.dt' (compat)...
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2407): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2407): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2410): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2410): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2410): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2411): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2407): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2407): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2410): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2410): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2410): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2411): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2415): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2415): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2418): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2418): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2418): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2419): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
char[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2415): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2415): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)[]).put
C:\dmd\windows\bin\..\..\src\phobos\std\string.d(2418): Error: 
function std.string.sformat!(char, long).sformat is a nested 
function and cannot be accessed from std.range.put!(Sink, 
const(char)[]).put
Error: Build command failed with exit code 1